Chapter-11 ➤ Light Shadows and Reflection

1. When an opaque object comes in the path of light it forms

an image with colours

shadow

black and white image

depends on the colour of the light

2. Which is a device to image the sun?

Plane mirror

Pinhole camera

A straight pipe

Glass slab

3. Out of these, which one is not a man-made luminous body?

Electric bulb

Burning candle

Firefly (Jugnu)

Oil lamp

4. When screen is far away from the objects, the shadow will have no penumbra.

True

False

5. Which types of objects do not allow light to pass through them?

Translucent

Opaque

Transparent

Penumbra

6. A torch bulb is a luminous object.

True

False

7. Image formed by a plane mirror is inverted.

True

False

8. Jugnu (Firefly) is a living luminous body.

True

False

9. Which letters of English alphabet will not show lateral inversion?

I, O, U

N, Z, X

I, X, E

A, E, I

10. Which of the following is a cold source of light?

Firefly (Jugnu)

Tube light

The sun

Electric bulb